Extremely bad service at Telkom

I first reported a fault with their WiFi service on the 11 June, a call centre agents said they would send a technician over to check on the problem, but that didn't happen until after three weeks. When the technician finally came, he worked on the problem but it wasn't fixed properly so I called Telkom again to report, only to be told the that another technician would be sent. Meanwhile I am getting billed the full amount for a service I am not getting as my WiFi is still not working properly. I don't know how many times I have called complaining about the poor services I am getting from Telkom but nothing seems to be happening, all I get is 'we are working on it'